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-rw-r--r--techlibs/ice40/cells.box12
1 files changed, 8 insertions, 4 deletions
diff --git a/techlibs/ice40/cells.box b/techlibs/ice40/cells.box
index 34d1f372e..d775efa78 100644
--- a/techlibs/ice40/cells.box
+++ b/techlibs/ice40/cells.box
@@ -2,8 +2,12 @@
# NB: Inputs/Outputs must be ordered alphabetically
-# Inputs: CI I1 I2
-# Outputs: CO O
-ICE40_CARRY_LUT 1 1 3 2
+# Inputs: CI I0 I1
+# Outputs: CO
+SB_CARRY 1 1 3 1
126 259 231
-316 400 379
+
+# Inputs: I0 I1 I2 I3
+# Outputs: O
+SB_LUT4 2 1 4 1
+316 379 400 449